Question

Crustacean fishery involves which of the following species?
A. Lobster and prawn
B. Shells of cuttlefish
C. Mussels and squids
D. Oysters and crab

Answer 1

The most important groups of crustaceans are barnacles, brachiopods, copepods and Malacostraca. There are about 1,220 barnacles, 1,000 brachiopods, 13,000 copepods, and 30,000 Malacostraca.

Complete step by step answer:
Crustaceans include diverse marine animals like the crabs, shrimps, prawns, lobsters, krill, crayfish, etc. Crustacean fishery is done to obtain high quantities of lobsters and prawns. They are the most common seafood among humans. Various species of lobsters and prawns have very high value in the commercial market.
Crustacean fisheries are focused on abundant species, particularly in relatively shallow and accessible areas. Shrimps are the most important wild fishery products, along with crabs, lobsters, and krill.
Crustaceans are a large and diverse arthropod taxon. These include animals such as crabs, lobsters, crayfish, shrimps, prawns, krill, woodlice, and barnacles. The crustacean group is a subphylum under the class Mandibulata. Some crustaceans are closely related to insects and hexapods.
Crustacean fisheries provide economic development and empowerment to food security. Crustacean sector generates a high value in exports. This enables the producers to buy lower-value products in the world market. Thus, crustacean fisheries provide a positive contribution to food security in producing and exporting countries.

So, the correct answer is option A.

Additional Information:
Crustaceans possess three distinct body parts, namely, head, thorax, and abdomen. In some cases, the head and thorax fuse to form a cephalothorax. They also have two pairs of antennae on their head, along with compound eyes, three pairs of mouthparts and a telson. Small crustaceans respire through their body surface by the process of diffusion, and large crustaceans breathe through gills.

Note:
Crustaceans generally have separate sexes, and appendages distinguish them on the abdomen known as swimmerets or pleopods. The first pair of pleopods are more extensive in male than in females. Terrestrial crabs like the Christmas Island red crab mate seasonally and then return to the sea to release their eggs. Females protect crabs' eggs until they hatch and convert into free-swimming larvae.